:root {
    --primary: #2ecc71; /* Verde App */
    --primary-dark: #27ae60;
    --text-dark: #2c3e50;
    --text-light: #95a5a6;
    --bg-color: #f0f2f5;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 12px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-dark);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 450px;
    text-align: center;
}

h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.subtitle {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-dark);
}

input[type="text"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
}

.hint {
    display: block;
    margin-top: 5px;
    font-size: 0.8rem;
    color: var(--text-light);
}

button.btn-primary {
    width: 100%;
    padding: 14px;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s;
}

button.btn-primary:hover {
    background-color: var(--primary-dark);
}

button.btn-primary:active {
    transform: scale(0.98);
}

button:disabled {
    background-color: #bdc3c7;
    cursor: not-allowed;
}

/* Área de Resultado */
#result {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
    display: none;
}

.success-box {
    background: #e8f8f5;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #d1f2eb;
}

.success-msg {
    color: var(--primary-dark);
    font-weight: bold;
    margin-bottom: 10px;
}

.btn-link {
    display: inline-block;
    text-decoration: none;
    background: var(--text-dark);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-top: 10px;
}

.error-msg {
    color: #e74c3c;
    background: #fdedec;
    padding: 10px;
    border-radius: 8px;
    font-size: 0.9rem;
}